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GX280 Upgrade

Been running Win 7 on a refurbished Dell GX280 tower for a few weeks now. The Windows Experience shows that my processor is the weakest point on my system. I found a few places that sell a 3.4Ghz 800fsb 1m cache Socket 775 processor for not to much. Will this processor work in my system with a 2.6Ghz processor? All other specs are the same. Anyone have experiences upgrading this system?

It is my understanding that that basic unit has some variations, and thus they may differ in chipset limitations AND particularly in Dell Bios attributes (many companies have limited Bios' built into their products).

One Dell link said their Dell Optiplex GX280 came with the Intel 915G chipset and could support an Intel® Pentium® 4 processor with 800 MHz front side bus and Hyper-Threading and 1MB L2 cache.

Thanks for the info everyone. Station already has the most current BIOS issued by Dell. I have 4 gigs of memory comming for it. I will hold off for another month and do a bit more research and then see about a 3.4ghz processor I found for relatively cheap.

hi all new user here. i have a dell gx280 with a 2.8 ht p4. i just got a geforce 7300gs with 256ram and i have 512 mb on board. i tried playing battlefield 2 with new card and i get terrible lag and graphics seem choppy. my question is do i need more ram to be able to play and will that video card require more power than the 250 watt supply that came with this dell?